package servlet;

import model.User;
import model.UserDao;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet("/login")
public class LoginServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("utf8");
        resp.setContentType("text/html;charset=utf8");
        String username=req.getParameter("username");
        String password=req.getParameter("password");
        if(username==null||password==null||username.equals("")||password.equals("")){
            String html="<h3>用户名或密码缺失!<h3>";
            resp.getWriter().write(html);
            return;
        }
        UserDao userDao=new UserDao();
        User user=userDao.selectByName(username);
        if(user==null){
            String html="<h3>用户名或密码不正确!<h3>";
            resp.getWriter().write(html);
            return;
        }
        if(!user.getPassword().equals(password)){
            String html="<h3>用户名或密码不正确!<h3>";
            resp.getWriter().write(html);
            return;
        }

        HttpSession session=req.getSession(true);
        session.setAttribute("user",user);
        resp.sendRedirect("blog_list");
    }
}
